fully exploited

fully exploited
said of a fish stock when removal of individuals is equal to the number of recruits entering the fishery (deaths equal births). In fisheries management this is the point where the population curve is at the maximum sustainable yield (MSY) and any further increase in effort will lead to overfishing. Corresponds to fishing at FMSY (in a classical production model relating yield to effort) or Fmax (in a model relating yield-per-recruit to fishing mortality)
a stock that is not being over- or underexploited

Dictionary of ichthyology. 2009.

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